" I was thinking,' said Crusher dreamily [...] 'about LANGUAGE and how in English two negatives make a positive, but in spriteish, a double negative is still a negative. However there is NO language in which two positives make a negative ...'
'Yeah right, like THAT'S the problem,' said Xar, sarcastically. 'I hadn't thought of that!' said Crusher in gentle surprise [...]. 'You're correct, Car. "Yeah, right" IS a statement in English where two positives make a negative... "
― Cressida Cowell , Twice Magic (The Wizards of Once #2)